PDFSimpli

Merge PDF Side By Side Online

Instantly Merge PDF Side by Side Online

Combine two documents horizontally onto a single page for easy comparison and reading.

Stitch pages horizontally

Great for document comparison

Custom page sizing options

24/7 multilingual phone, chat and email support | +1-844-898-1076

Upload Your Files

Drop PDFs Here

UPLOAD FILES TO MERGE

Great for document comparison

Custom page sizing options

Stitch pages horizontally

24/7 multilingual phone, chat and email support | +1-844-898-1076

Unlimited access to all our tools

How to merge PDF files online

Merge your PDF files online in 4 simple steps:
Click on "UPLOAD FILES TO MERGE" or select, drag and drop your files in "Drop PDFs Here."
Arrange the files in the desired order by dragging and dropping.
Click the "MERGE" button.
Download the combined PDF file or share it with anyone.

Merge your PDF files online in 4 simple steps:

Click on "UPLOAD FILES TO MERGE" or select, drag and drop your files in "Drop PDFs Here."

Arrange the files in the desired order by dragging and dropping.

Click the "MERGE" button.

Download the combined PDF file or share it with anyone.

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An AI-powered tool suite with everything you need

Frequently asked questions about editing a PDF

Upload two documents to PDFSimpli and select the horizontal layout to merge PDF side by side online instantly.

It's perfect for comparing contracts, reading booklets, or reviewing translations when you merge PDF side by side online.

The pages scale to fit, but remain high resolution and clear when you merge PDF side by side online.

Yes, our browser-based tool makes it easy to merge PDF side by side online from any operating system.

See All FAQS

All you need to
know about PDFs

How to type in a PDF in 5 simple steps

Writing on a PDF is not as strange as it sounds, but it’s so simple that it can be done in five steps

Quickly sign a PDF and get e-signatures

Our e-sign tool makes it a breeze to sign and send PDF contracts, invoices and other documents

How to simply add images to any PDF document

It’s easy to convert Word to Excel adding an image and editing any PDF simple, fast and free

How to merge multiple PDF files together for free

The best way to combine several PDFs into a single document, arranging pages as needed, is with our powerful merge tool

All you need to know about PDFs

How to simply add images

to any PDF document

It’s easy to convert Word to Excel adding an image and editing any PDF simple, fast and free

How to merge multiple PDF files together for free

The best way to combine several PDFs into a single document, arranging pages as needed, is with our powerful merge tool

How to type in a PDF

in 5 simple steps

Writing on a PDF is not as strange as it sounds, but it’s so simple that it can be done in five steps

Quickly sign a PDFand get e-signatures

Our e-sign tool makes it a breeze to sign and send PDF contracts, invoices and other documents

Merge a PDF in minutes

Combine two documents horizontally onto a single page for easy comparison and reading.

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